build(deps): update criterion requirement from 0.3 to 0.4 (#459)

Updates the requirements on [criterion](https://github.com/bheisler/criterion.rs) to permit the latest version.
- [Release notes](https://github.com/bheisler/criterion.rs/releases)
- [Changelog](https://github.com/bheisler/criterion.rs/blob/master/CHANGELOG.md)
- [Commits](bheisler/criterion.rs@0.3.0...0.4.0)

---
updated-dependencies:
- dependency-name: criterion
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.toml

@@ -39,7 +39,7 @@ thiserror = "^1.0"
 procfs = { version = "^0.14", optional = true, default-features = false }
 
 [dev-dependencies]
-criterion = "0.3"
+criterion = "0.4"
 getopts = "^0.2"
 hyper = { version = "^0.14", features = ["server", "http1", "tcp"] }
 tokio = { version = "^1.0", features = ["macros", "rt-multi-thread"] }

static-metric/Cargo.toml

@@ -19,7 +19,7 @@ quote = "1.0"
 lazy_static = "1.4"
 
 [dev-dependencies]
-criterion = "0.3"
+criterion = "0.4"
 prometheus = { path = "../" }
 
 [features]